From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Mosberger Date: Mon, 11 Nov 2002 18:48:27 +0000 Subject: Re: [Linux-ia64] [PATCH] Performance Patch for TLB misses Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-ia64@vger.kernel.org >>>>> On Mon, 11 Nov 2002 09:49:49 +0100, Christian Hildner said: Christian> Yes, but for the kernel it is allowed also without the Christian> patch and the the user could insert a duplicate mapping Christian> for the same physical page but this useless for him Christian> because of the access rights and also the kernel would Christian> not use these pages (because the kernel has no knowledge Christian> of this pages). Useless to the user, but dangerous to the health of the machine! Please note that attribute aliasing can lead to a machine-check and therefore is an absolute no-no (the machine check could be triggered either by a hardware-prefetch or due to speculative memory accesses inside the kernel). --david